This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D on Textiles. Jan 1, Buy ASTM D R TEST METHOD FOR TEARING STRENGTH OF FABRICS BY FALLING-PENDULUM (ELMENDORF-TYPE). The ASTM D Elmendorf based tear test is the most popular test for measuring the tearing strength of most fabrics. The Elmendorf test testing machine uses.
|Published (Last):||10 December 2014|
|PDF File Size:||7.39 Mb|
|ePub File Size:||10.95 Mb|
|Price:||Free* [*Free Regsitration Required]|
We are confident that we have what you are looking for. Analysis of the data was conducted using the Practice D and Practice D If you feel that your comments have not received qstm fair hearing you should make your views known to the ASTM Committee satm Standards, at the address shown below. Place the gage in the stationary specimen clamp in the usual manner for testing fabric. Sampling and Test Specimens 7. Ensure that there is no perceptible movement of the tester base or bench during the swing of the pendulum.
NOTE 7—The tabulated values of the critical differences should be considered to be a general statement, particularly with respect to betweenlaboratory precision.
COF Inclined Plane Tester Measure the static coefficient of friction of various materials using a variable inclined plane and a sliding block. Historical Version s – view previous versions of standard. If the pointer friction does not lie between two and three divisions, remove the pointer, wipe c1424 bearing clean, and apply a trace of clock d14244 to the groove of the bearing.
The three woven fabric types were: Vacuum Leak Tester for bottles for food, chemical and pharmaceutical applications. Adjust the knife position such that the highest point of the blade just touches the bottom edge of the gage and then secure it in place.
Four of the eight specimens were tested on one day and four specimens were tested on a second day. MFY leak detector for our pouch packaging. This standard has been approved for use by agencies of the Department of Defense. Ensure that the balance of the fabric remaining to be torn is 43 6 0. There were sufficient differences related to the fabric type and structure to warrant listing the components of variance and the critical differences separately.
Label to maintain specimen identity.
ASTM D Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Seal Strength system to test 3 sides seal bags. NOTE 3—The reading obtained is directly proportional to the length of the material torn, therefore, it is essential that the specimen be prepared to the exact size speci?
With the jaw spacer in place, tighten the shoulder head screw on the pendulum support. Otherwise, for some test instruments manual calculation of the average is required. Loosen the shoulder head screw on top of the pendulum support. In any event, it is recommended that computer-processed data be veri?
It measures the amount of energy required to perform the tearing operation by measuring the peak follow-through angle of the pendulum after the tearing action. If a smooth release cannot be obtained by this adjustment the pendulum or the pendulum stop may require repair or replacement.
ASTM D1424 Tearing Strength of Fabrics by Falling-Pendulum Type (Elmendorf) Apparatus
Before a meaningful e1424 can be made about two speci? Movement of the instrument during the swinging of the pendulum is a signi? Current edition approved Jan.
Record the scale reading required to completely tear the test specimen. This precaution is most important when testing bowed fabrics. Instructions are provided for testing specimens with, or without, wetting.
Thickness micron testing equipment with Resolution 0. Ensure the gage is positioned with the wide dimension upwards and the projection extending over the edge of the stationary clamp asm enough such that the knife can be adjusted 6 to the bottom edge of the gage. The average results from the two laboratories should be compared using appropriate statistical analysis and an acceptable probability level chosen by the two parties before the testing began.
D1442 die provides the basic rectangular test specimen 6 2 mm 4 6 0.
Open the catalog to page 2. Gently push the pendulum in until the jaw spacer gage has just enough clearance to slide out the top of the clamps. For fabrics not readily wet out with water, such as those treated with waterrepellent, or water resistant materials, add a 0. Raise the pendulum to its cocked position.
The Elmendorf test testing machine uses a falling pendulum to tear a fabric specimen. See Test Methods D and D Tensile Tester for both compression and tensile, with loads typically N.
Labthink provides COF Tester for coef.
If the pendulum stop height is changed, verify clamp alignment and zero position. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Align, if necessary, by turning the leveling thumb screw at the left end of the tester base. The clamping surface in each jaw is at least 25 mm 1. Record values as read from the direct reading scale to the nearest mN gf. Reassemble and check pointer friction. If the knife is dull it will produce a V-notch near the top of the cut and push the material outward. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Recheck zero and readjust the pointer stop if necessary. Precision and Bias Take the specimens to be used for the measurement of the cross-machine with the longer dimension parallel to the cross-machine direction. We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications.